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隧道震损快速评估方法研究

DOI: 10.13197/j.eeev.2015.04.164.zhaoxy.019, PP. 164-170

Keywords: 隧道,易损性模型,地震动衰减模型,汶川地震

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Abstract:

基于汶川地震隧道震害调查资料,将隧道震害按受损程度分为轻微破坏、中度破坏、严重破坏和完全损毁四个等级。根据四川省内131个地震台站实测地震记录修正Zhao等的地震动衰减模型,并利用修正后的衰减模型计算各个隧道工点处的地表峰值加速度PGA,选取PGA作为反映地震动强度的参数。将隧道结构划分为洞口段、断层破碎段和普通段,基于双参数的对数正态分布假设,分别建立隧道整体、洞口段、断层破碎段和普通段的易损性模型。结合实际工程中得到的损失比数据,以都汶公路四座隧道为例,简述了隧道易损性模型在震后震害损失快速估计中的使用方法。

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